Container cap



FIG. 1 is a front view of a container cap showing my new design;

FIG. 2 is a top-plan view thereof, the right, left and bottom-plan views being identical;

FIG. 3 is a rear view thereof; and,

FIG. 4 is a bottom perspective view thereof.

The broken lines in the drawing depict environment only and form no part of the claimed design. 

The ornamental design for a container cap, as shown and described. 